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Let cos^(-1) (4x^(3) -3x) = a + b cos^(-...

Let `cos^(-1) (4x^(3) -3x) = a + b cos^(-1) x`
If `x in ((1)/(2), 1]`, then the value of `underset(y rarr a)("lim") b cos (y)` is

A

`-(1)/(3)`

B

-3

C

`(1)/(3)`

D

3

Text Solution

Verified by Experts

The correct Answer is:
D
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